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18 May, 20:24

Find MN when M to N is 2.5x, N to R is x and M to R (the full length) is 5x - 3

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  1. 18 May, 20:51
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    MN + NR = MR

    2.5x + x = 5x - 3

    3.5x = 5x - 3

    3.5x - 5x = - 3

    - 1.5x = - 3

    x = - 3 / - 1.5

    x = 2

    MN = 2.5x ... 2.5 (2) = 5 <==

    NR = x = 2

    MR = 5x - 3 ... 5 (2) - 3 = 7
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